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Author Topic: Staling when clutch depressed  (Read 35473 times)
userpike
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« Reply #15 on: February 23, 2014, 12:46:37 PM »

I had issues with am extra ligth flywheel, solved modifying torque reserve and some refinement in TUVB, TEMIN and FKKVS, but car has stroker 2.0 with 11:1 Cr E100, 1.000cc and GTX3071R.

I increased idle torque reserve to see if that helps. Flashing today

What exactly did you guys do to idle torque reserve? screen shot? and why?
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userpike
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« Reply #16 on: February 23, 2014, 07:26:54 PM »

What exactly did you guys do to idle torque reserve and why?

did you use a formula?



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catbed
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« Reply #17 on: February 24, 2014, 10:20:06 AM »

How did the problem manifest?

Tuning is not the solution to all problems.

What is the thought process behind increasing idle torque reserve?

What is the minimum injection time for those injectors?

What is te and ti when the car stalls?

I built an exhaust manifold for my car and was running MAFless until I could get an intake setup on it. It had some problems with idling and stalling until I increased requested torque at idle in IRL. Then when I got my MAF in, the problem started. I believe it happened before the exhaust manifold as well, but I can't quite remember.

I realize tuning doesn't cause everything, but I'm confident I have no hardware problems. I increased torque reserve to hopefully hold the throttle plate open more when the revs drop, and also because of overspeed's comment.

I got the minimum injector time from the ev14 migration thread. I'll have to do some research as to what it is actually supposed to be.

ti is 1.5ms when I let off the throttle, and jumps up to 6.25ms I assume to try and prevent stalling. I did not log te_w, but I have added it to my log file and will try and take another log today.

I should also point out that if I let the car decelerate in gear to around 1500RPM and then push the clutch in, the car rarely stalls and comes down to idle nicely.
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phila_dot
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« Reply #18 on: February 24, 2014, 12:21:27 PM »

I got the minimum injector time from the ev14 migration thread. I'll have to do some research as to what it is actually supposed to be.

ti is 1.5ms when I let off the throttle, and jumps up to 6.25ms I assume to try and prevent stalling. I did not log te_w, but I have added it to my log file and will try and take another log today.

This is when it stalls?
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catbed
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« Reply #19 on: February 24, 2014, 12:27:01 PM »

This is when it stalls?

Correct. See attached image from the log I took not 10 mins ago
« Last Edit: February 24, 2014, 12:33:04 PM by catbed » Logged
phila_dot
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« Reply #20 on: February 24, 2014, 03:27:14 PM »

You hit TEMIN from ~2.5 - 3.5 seconds and it appears to cause the stall.

The real question might be why te drops to 0.5ms, but raising TEMIN might fix it.
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catbed
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« Reply #21 on: February 24, 2014, 03:40:01 PM »

You hit TEMIN from ~2.5 - 3.5 seconds and it appears to cause the stall.

The real question might be why te drops to 0.5ms, but raising TEMIN might fix it.

The log shows that te is .44 at 2.5s whereas TEMIN is .3787. What should the new TEMIN value be?
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phila_dot
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« Reply #22 on: February 24, 2014, 04:17:15 PM »

The log shows that te is .44 at 2.5s whereas TEMIN is .3787. What should the new TEMIN value be?

I was thinking your TEMIN was 1.5ms for some reason.

Try TEMIN at 0.75ms. This shouldn't cause hanging revs or any other problems and may keep you above the knee.

Try to get the minimum injection time from ID if you can.
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catbed
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« Reply #23 on: February 24, 2014, 05:19:10 PM »

I was thinking your TEMIN was 1.5ms for some reason.

Try TEMIN at 0.75ms. This shouldn't cause hanging revs or any other problems and may keep you above the knee.

Try to get the minimum injection time from ID if you can.

Set TEMIN at .75, problem is still present. Also, goes into the 11's in AFR at low load cruising.

Maybe I am overlooking something hardware related? Is there a function responsible for catching the revs as they come down and slowly lowering them to idle speeds? Like, the revs will drop and then catch at ~1100RPM, and then drop slowly to idle. Do you understand what I mean?
« Last Edit: February 24, 2014, 05:27:17 PM by catbed » Logged
phila_dot
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« Reply #24 on: February 24, 2014, 05:26:48 PM »

Post graph?
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catbed
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« Reply #25 on: February 24, 2014, 05:28:32 PM »

Post graph?

Done. Log too.

Take a look at my last post too, I edited it.
« Last Edit: February 24, 2014, 05:30:08 PM by catbed » Logged
overspeed
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« Reply #26 on: February 25, 2014, 06:46:20 AM »

Set TEMIN at .75, problem is still present. Also, goes into the 11's in AFR at low load cruising.

Maybe I am overlooking something hardware related? Is there a function responsible for catching the revs as they come down and slowly lowering them to idle speeds? Like, the revs will drop and then catch at ~1100RPM, and then drop slowly to idle. Do you understand what I mean?

You mean Dashpot ?   Don´t think it´s you problem or "solution"...

Add to log STFT and MAF values (Kg/s)

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catbed
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« Reply #27 on: February 25, 2014, 07:09:03 AM »

You mean Dashpot ?   Don´t think it´s you problem or "solution"...

Add to log STFT and MAF values (Kg/s)

They are in the log I posted.

And I was just suggesting ideas about the dashpot. I was always curious of that function anyway.
« Last Edit: February 25, 2014, 08:22:23 AM by catbed » Logged
catbed
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« Reply #28 on: February 25, 2014, 11:07:19 AM »

Try to get the minimum injection time from ID if you can.

ID says as small as the software will allow.
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catbed
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« Reply #29 on: February 26, 2014, 02:29:37 PM »

Any more ideas?
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